ISA DCB Hard Disk/Floppy Controller Settings and Configuration

CONNECTIONS
Function	Location
4-pin connector-drive active LED	CN1
34-pin data cable connector - floppy drives	CN2
50-pin SCSI connector - internal	CN3
50-pin SCSI connector - external	CN4

SCSI ADDRESS
SCSI ID		SW1/Switch 1	SW1/Switch 2	SW1/Switch 3
»	7	on	on	on
	0	off	off	off
	1	on	off	off
	2	off	on	off
	3	on	on	off
	4	off	off	on
	5	on	off	on
	6	off	on	on

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive port address 3F0-3F7h	JP14	open
	Floppy drive port address 370-377h	JP14	closed
»	Floppy drive disabled	JP15 & JP16	open
	Floppy drive enabled	JP15 & JP16	closed
»	I/O channel ready disabled	JP17/pins 1 & 2	closed
»	I/O channel ready enabled	JP17/pins 2 & 3	closed
»	SCSI Parity check enabled (BT-542 only)	SW1/switch 4	on
	SCSI Parity check disabled (BT-542 only)	SW1/switch 4	off
»	SCSI Auto Sense function enabled	SW1/switch 5	on
	SCSI Auto Sense function disabled	SW1/switch 5	off
»	Synchronous transfer initiation from controller disabled	SW1/switch 6	on
	Synchronous transfer intitiation from controller enabled	SW1/switch 6	off

DMA CHANNEL
DMA		SW1/Switch 7	SW1/Switch 8
»	5	on	on
	6	off	on
	7	on	off
	Disabled	off	off

I/O PORT ADDRESS
Address		SW2/Switch 1	SW2/Switch 2	SW2/Switch 3
»	330h-333h	on	on	on
	134h-137h	on	off	off
	234h-237h	off	on	off
	334h-337h	on	on	off
	130h-133h	on	off	on
	230h-233h	off	on	on
	Reserved	off	off	on
	Reserved	off	off	off

BIOS ADDRESS BT-542B
Address		SW2/Switch 4	SW2/Switch 5
»	DC000h	on	on
	D8000h	off	on
	C8000h	off	off
	Disabled	on	off

BUS TRANSFER RATE BT-542B
Rate		Jumper JP11	Jumper JP13
»	5.0MB/sec	open	open
»	5.7MB/sec	open	closed
»	6.7MB/sec	closed	open
»	8.0MB/sec	closed	closed
Note: It is recommended that you leave JP11 and JP13 open at all times.

INTERRUPT REQUEST CONFIGURATION
IRQ		SW2/Switch 6	SW2/Switch 7	SW2/Switch 8	JP3
»	IRQ11	on	on	on	open
	IRQ9	on	off	on	open
	IRQ10	off	on	on	open
	IRQ12	off	off	on	open
	IRQ14	on	on	off	open
	IRQ15	off	on	off	closed
	Reserved	off	off	off	N/A
	Reserved	on	off	off	N/A

INTERRUPT REQUEST CONFIGURATION (CONTINUED)
IRQ		JP4	JP5	JP6	JP7	JP8
»	IRQ11	open	open	closed	open	open
»	IRQ9	open	open	open	open	closed
	IRQ10	open	open	open	closed	open
	IRQ12	open	closed	open	open	open
	IRQ14	closed	open	open	open	open
	IRQ15	open	open	open	open	open
	Reserved	N/A	N/A	N/A	N/A	N/A
	Reserved	N/A	N/A	N/A	N/A	N/A

MISCELLANEOUS TECHNICAL NOTE

The ISA DCB can operate alone or paired with another ISA DCB. If you are using a pair of ISA DCB’s, please use the following defaults for the second card: SCSI ID: 7, SCSI Parity Check: Disabled, Auto-sense: Enabled, SCSI sych negotiation: Enabled, DMA Channel: 6, I/O Address: 334h, Host BIOS: Disabled, Interrupt: IRQ12.